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Included review availability: Your plan provides up to 10 included reviews per hour; 3 remain after this review. WalkthroughChangesThe migration test suite now uses shared synthetic fixtures and helpers. It adds coverage for dependency resolution, file and tarball platforms, workspace cases, lockfile stability, exact install output, and bounded Arborist fixture reporting. Obsolete fixture files were removed. Migration test modernization
Suggested reviewers: Merge Risk: ⚪ Minimal · up to This change improves migration-test concurrency and assertion coverage without changing product behavior; no actionable merge-blocking risk remains beyond normal checks and review. 🚥 Pre-merge checks | ✅ 4✅ Passed checks (4 passed)
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Updated 10:25 AM PT - Aug 30th, 2026
✅ @robobun, your commit 6e3e3dee47d1087f52a8cdb031cc31511eb5eee6 passed in 🧪 To try this PR locally: bunx bun-pr 40956That installs a local version of the PR into your bun-40956 --bun |
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In `@test/cli/install/migration/migrate.test.ts`:
- Around line 159-166: Update the gitEnv test environment object to set
GIT_CONFIG_GLOBAL to a guaranteed non-existent path, using the existing os
module or adding its import if needed, so git ignores the developer’s global
configuration while preserving the current environment settings.
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test/cli/install/migration/lockfile-with-workspaces/package-lock.jsonis excluded by!**/package-lock.jsontest/cli/install/migration/migrate-package-with-dependency-on-root/package-lock.jsonis excluded by!**/package-lock.jsontest/cli/install/migration/missing-resolved-properties/package-lock.jsonis excluded by!**/package-lock.jsontest/cli/install/migration/npm-version-to-git-resolution/package-lock.jsonis excluded by!**/package-lock.json
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test/cli/install/migration/add-while-migrate-fixture.jsontest/cli/install/migration/lockfile-with-workspaces/.gitignoretest/cli/install/migration/lockfile-with-workspaces/package.jsontest/cli/install/migration/lockfile-with-workspaces/packages/pkg0/package.jsontest/cli/install/migration/lockfile-with-workspaces/packages/pkg1/package.jsontest/cli/install/migration/lockfile-with-workspaces/packages/pkg2/package.jsontest/cli/install/migration/lockfile-with-workspaces/packages/pkg3/package.jsontest/cli/install/migration/migrate-from-lockfilev2-fixture.jsontest/cli/install/migration/migrate-package-with-dependency-on-root/.gitignoretest/cli/install/migration/migrate-package-with-dependency-on-root/package.jsontest/cli/install/migration/migrate.test.tstest/cli/install/migration/missing-resolved-properties/.gitignoretest/cli/install/migration/missing-resolved-properties/bunfig.tomltest/cli/install/migration/missing-resolved-properties/package.jsontest/cli/install/migration/npm-version-to-git-resolution/.gitignoretest/cli/install/migration/npm-version-to-git-resolution/package.json
💤 Files with no reviewable changes (15)
- test/cli/install/migration/lockfile-with-workspaces/packages/pkg2/package.json
- test/cli/install/migration/missing-resolved-properties/bunfig.toml
- test/cli/install/migration/migrate-package-with-dependency-on-root/.gitignore
- test/cli/install/migration/lockfile-with-workspaces/.gitignore
- test/cli/install/migration/lockfile-with-workspaces/package.json
- test/cli/install/migration/lockfile-with-workspaces/packages/pkg3/package.json
- test/cli/install/migration/lockfile-with-workspaces/packages/pkg1/package.json
- test/cli/install/migration/npm-version-to-git-resolution/.gitignore
- test/cli/install/migration/add-while-migrate-fixture.json
- test/cli/install/migration/lockfile-with-workspaces/packages/pkg0/package.json
- test/cli/install/migration/migrate-from-lockfilev2-fixture.json
- test/cli/install/migration/npm-version-to-git-resolution/package.json
- test/cli/install/migration/missing-resolved-properties/.gitignore
- test/cli/install/migration/migrate-package-with-dependency-on-root/package.json
- test/cli/install/migration/missing-resolved-properties/package.json
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…current and exact Five cases fetched svelte, lodash and jquery from registry.npmjs.org and one cloned a GitHub repository. Every top-level case is now concurrent, builds its tree in place against the in-process local registry, a git+file:// repository or the offline registry, and has its own install cache. Each bun install or bun add asserts its normalized stdout and stderr, the exit code, the full bun.lock and the node_modules layout. The six checked-in fixtures are removed.
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Stacked on #40977, which moves the arborist fixture cases out of this file.
Problem
test/cli/install/migration/migrate.test.tsfetchedsvelte,lodashandjqueryfrom registry.npmjs.org, and one cloned a GitHub repository.test/CLAUDE.mdforbids that, and the shared install cache and network are the likely cause of the batch-only failures that put the file ontest/parallel-denylist.txt(test: pull five batch-flaky files out of the parallel batch #40419).success!.Fix
test.concurrent. It builds its tree in place against the in-processlocalRegistry(), agit+file://repository, or the offline registry, with its own install cache. The six checked-in fixtures are removed.bun installorbun addunder test asserts normalized stdout and stderr, the exit code, the fullbun.lock(inline snapshot) and the exactnode_moduleslayout. Twonot.toContain("error")checks became exact output checks.install(dir, ...args)keeps its name and call sites. The describe block keeps its structured assertions.bun bd test test/cli/install/migration/migrate.test.ts, debug ASAN: 29.1s on main, 9.1s on test(install): move the arborist fixture cases out of migrate.test.ts #40977, 7.4s, 7.5s, 7.6s here. 69 pass and 1 todo in every run. The same tests passed on Windows x64 in the first version of this PR.Background
bun pm migrateconvertspackage-lock.jsonintobun.lock.bun installandbun addmigrate it on the fly when there is nobun.lock.localRegistry()is aBun.servethat serves the manifests and tarballs intest/cli/install/registry/packagesand records every request path.BUN_INSTALL_CACHE_DIRis set per project: with a shared warm cache a child skips downloads, and the request assertions would depend on case order.Notes
Fixtures replaced.
add-while-migrate-fixture.jsonandmigrate-from-lockfilev2-fixture.json(svelte trees, lockfileVersion 3 and 2) became onetest.concurrent.each([3, 2])case:no-depsis pinned to 1.0.0 by the lockfile while its range is*andlatestis 2.0.0. The case asserts thatbun add is-number@1.0.0keeps 1.0.0 and never requests theno-depsmanifest.npm-version-to-git-resolution(an npm range resolved togit+ssh://git@github.com/...) uses a repository built in the temp dir withgitand agit+file://URL;lockSnapshotreplaces the URL and the commit with placeholders, andgit()ignores the system and user config.missing-resolved-properties,lockfile-with-workspacesandmigrate-package-with-dependency-on-rootare written inline with the same content. Each fixture needed a.gitignore, because the repository ignores**/package-lock.json.Assertion changes. Old:
existsSync, oneversionfield,toContain("success!"),toContain("migrated lockfile"). New, for each of the ten rewritten cases: exact normalized stderr and stdout (Resolved, downloaded and extracted [N]included, which counts the tasks of a cold cache), exit code, fullbun.lock,node_moduleslayout, and the registry request log. The three migration-failure cases assert the exact error text per lockfile kind. The already-concurrent top-level cases now run against the offline registry like the describe block does, so an accidental registry access fails.Open PRs on this file. #38861 appends
npm-shrinkwrap.jsonto thelockfilesarray, which is now a table with the exact stderr per kind, so it needs one more row. #38698 and #38850 add cases in the rewritten region; their new cases can usesynthetic()andinstall(). #29509 callsinstall(testDir, "--dry-run"), which still exists.Follow-up. Once this lands,
cli/install/migration/migrate.test.tscan come offtest/parallel-denylist.txtandexcludeFilesintest/parallel-allowlist.json, so the runner puts it in the parallel batch.Self-review. A review of the first version raised that the arborist change and this rewrite were one PR, that the in-file scheduler copied the runner's concurrency cap, and that the rewrite deleted
install()while open PRs call it. The arborist cases moved to their own file in #40977 with no scheduler, andinstall()stays.no test proof · iteration 0 · platform-specific test(s) that do not run on this machine, deferring to CI, which covers all platforms: test/cli/install/migration/migrate.test.ts